Answer:
summary-
It takes place during Christmas. The main characters are Jim and Della. They are poor, and don't have enough money to get each other presents. They both sold their most prized possessions to pay for a gift for each other. Della cuts off all her hair and sells it to buy a gift for Jim. She buys him a chain for his watch. Jim sold his watch to buy a gift for Della. He bought her combs for her long beautiful hair. They both sacrificed their favorite things for the love of one another.
Answer:
to set up the central conflict between the families, to invoke feelings of sympathy in the audience, and to inform the audience where the story takes place
Explanation:
Answer: I'm not going to write your whole essay for you, but some good reasons to use would be: A change in atmosphere, they can experience what life is like on a different planet, they can get a chance to learn more about mars or anything else about space, and they can compare and contrast how different mars is from earth along with make new memories on a different planet.
An argument is valid only if it takes form in the impossible to make it seem true;)